Datolite: Datolite is a semi rare silicate mineral of the gadolinite group. It appears as surface-growing, sho... (read full)

Danburite: Danburite is a silicate of clear, prismatic crystals, with wedge-shaped terminations. It is occasion... (read full)

Coral: Corals are the supporting framework of small polyps. Each coral polyp, a tiny marine animal that li... (read full)

Citrine: Citrine is an attractive type of quartz, which is the commonest mineral on the earth's surface. But ... (read full)

Chrysoprase: Chrysoprase is a variety of chalcedony, usually black or leek-green in color. The most highly-prized... (read full)

Chrysocolla: Chrysocolla is a silicate that forms as stalactitic masses, in radiating groups, or closely-packed a... (read full)

Chrysoberyl: Chrysoberyl appears as prismatic, tabular crystals often v-shaped twins forming pseudo-hexagonal cry... (read full)

Chatoyant Quartz: When quartz contains similarly-oriented fibrous inclusions, and is then appropriately-cut, in caboch... (read full)

Chalcedony: Chalcedony is a compact form of silica, composed of microscopic quartz crystals. It is softer than q... (read full)

Cerussite: Cerussite is a colorless carbonate of the aragonite mineralogical classification. It appears as colo... (read full)